Hypertrophic cardiomyopathy is sometimes called idiopathic hypertrophic subaortic (beneath the aorta) stenosis, abbreviated IHSS. This overgrowth creates a bulge that protudes into the ventricular chamber and impedes the flow of blood from your heart to the aorta and the res body.When this obstruction is present, the cardiomyopathy is also called hypertrophic obstructive cardiomyopathy (HOCM, often pronounced HO-kum”). In this condition, the problem is not that the heart muscle but that the overgrown heart impedes the flow of blood through and out of the heart.If the example of the plastic bottle is used, the sides of the bottle have thickened, especially near the opening. The thickening decreases the space inside the bottle and gets way of the opening.With HOCM, one of the leaflets of the mitral valve between the left and the left atrium ventricle moves forward during contraction, and this, with the thicker septum between the  ventricles, obstructs blood flow. Ironically, the obstruction to blood flow may worsen the harder the heart squeezes, because the thickened septum protrudes even farther into the pathway of the blood trying to flow out of the heart.Hypertrophic cardiomyopathy not always affect the area beneath the  aortic valve. Sometimes the condition occurs down near the apex (tip) of the heart, and in other individuals overgrowth is distributed more or evenly throughout the heart muscle. These cases can be likened to the plastic walls of the bottle becoming thickened all over and making squeezing less effective. In those situations, problem is not due to obstruction. The thickened muscle is simply inefficient at pumping and especially at relaxing. The blood flow can decrease because of this, and heart rhythms are a problem as well.*94\252\8*

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